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Related Experiment Videos

P-glycoprotein and bilirubin disposition.

J F Watchko1, M J Daood, B Mahmood

  • 1Division of Neonatology and Developmental Biology, Department of Pediatrics, University of Pittsburgh School of Medicine, Magee-Womens Research Institute, 300 Halket Street, Pittsburgh, PA 15213, USA.

Journal of Perinatology : Official Journal of the California Perinatal Association
|January 23, 2002
PubMed
Summary

Unconjugated bilirubin may be a substrate for P-glycoprotein (Pgp), an efflux pump at the blood-brain barrier. Pgp

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Biochemistry

Background:

  • P-glycoprotein (Pgp) is an ATP-dependent efflux pump found on brain capillary endothelial cells and astrocytes.
  • Pgp limits the entry of lipophilic substances into the central nervous system.
  • Understanding Pgp's role is crucial for drug delivery and understanding substance disposition in the brain.

Purpose of the Study:

  • To review evidence on unconjugated bilirubin as a Pgp substrate.
  • To examine the developmental expression of Pgp at the blood-brain barrier and gastrointestinal tract.
  • To provide insights into bilirubin disposition in immature individuals.

Main Methods:

  • Literature review of existing studies.
  • Analysis of Pgp expression patterns during development.

Related Experiment Videos

  • Assessment of bilirubin's interaction with Pgp.

    • Main Results:

    • Evidence suggests unconjugated bilirubin may be transported by Pgp.
    • Pgp expression at the blood-brain barrier and gut epithelium shows developmental changes.
    • These findings correlate with potential differences in bilirubin handling in neonates.

    Conclusions:

    • Unconjugated bilirubin's potential as a Pgp substrate warrants further investigation.
    • Ontogeny of Pgp influences bilirubin disposition, particularly in immature subjects.
    • This has implications for understanding conditions like neonatal jaundice and kernicterus.